A jon operation is the association of objects in one data source with objects that share a common attribute in another data source.
Join operations target data sources whose relationships to each other cannot be followed directly.
Join Type
In LINQ, Join implements an inner join.GroupJoin has no direct equivalent in relational database terms.
It implements a superset of inner joins and outer joins.
Methods
| Method | Description | Query expression |
|---|---|---|
Join | Join two sequences based on key-selector functions and extract pairs of values. | join … in … on … equals … |
GroupJoin | Join two sequences based on key-selector functions and group the resulting matches from each element. | join … in … on … equals … into … |
